Authentication in Python

A simple Flask-based user authentication system with registration, login, and dashboard features. This project demonstrates secure user management using Flask, SQLAlchemy, and bcrypt for password hashing.

Features

• User Registration: Secure registration with server-side validation for name, email, and password.
• User Login: Authenticated login with session management.
• Dashboard: Protected dashboard accessible only to logged-in users.
• Logout: Secure logout functionality.
• Password Security: Passwords are hashed using bcrypt.
• Input Validation: Both client-side and server-side validation for forms.
• Flash Messages: User feedback for actions like successful registration or login errors.
• Modern UI: Responsive design with CSS animations and gradients.

Technologies Used

• Flask: Web framework for Python.
• Flask-SQLAlchemy: ORM for database interactions.
• bcrypt: For secure password hashing.
• SQLite: Database for storing user data.
• HTML/CSS/JavaScript: For frontend templates and styling.

Installation

1. Clone the repository:

   git clone https://github.com/yourusername/authentication-python.git
   cd authentication-python

2. Install dependencies: Make sure you have Python installed. Then run:

   pip install flask flask-sqlalchemy bcrypt

3. Run the application:

   python app.py

4. Access the app: Open your browser and go to http://127.0.0.1:5000/

Usage

• Registration: Visit /reg to create a new account. Provide a name (at least 3 characters), a valid email, and a password (at least 8 characters with at least one letter and one number).
• Login: Visit /login to log in with your email and password.
• Dashboard: After logging in, you'll be redirected to the dashboard.
• Logout: Click the logout link to end your session.

Project Structure

authentication-python/
├── app.py                 # Main Flask application
├── README.md              # Project documentation
├── instance/
│   └── site.db            # SQLite database
├── static/
│   └── styles.css         # CSS styles for the UI
└── templates/
    ├── reg.html           # Registration page
    ├── login.html         # Login page
    └── dashboard.html     # User dashboard

Security Features

• Password hashing with bcrypt.
• Session-based authentication.
• Input sanitization and validation.
• Protection against common vulnerabilities like SQL injection via SQLAlchemy.

Screenshot

1 Registration 2 Login Dashbord

Contributing

Contributions are welcome! Please fork the repository and submit a pull request.